Hi @abright,
Yes, in many cases the group max may be artificially high. The group max genetic ancestry group may also be incorrect as we are not accounting for all the samples present in v4.0 at the moment. The addition of the missing exome samples in v4.1 (coming soon!) could add a large number of samples, and thus ANs, to a genetic ancestry group which could change the current group max.
Best,
Mike